Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26as...61...27l&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 61, July 1985, p. 27-36.
Astronomy and Astrophysics
Astronomy
3
Binary Stars, Infrared Astronomy, Light Curve, Stellar Orbits, Fourier Analysis, Tables (Data)
Scientific paper
The results of a new observing campaign, conducted in April 1980 and equipped with the steady curves of March 1978 are presented and discussed. Seven infrared light curves of the contact binary 44 i Bootis, including five complete curves secured on a single night during one week, are reported. When the ephemeris of Duerbeck (1975) is used, sine terms are detected in the light curves. Evidence of a period jump (+13 x 10 to the -7th day), presumably in 1978-1979, or a slow period change of 6.7 x 10 to the -10th originating in 1976 is shown by an O-C diagram of observations. A new ephemeris is proposed, and when used, the light curves of April 1980 are found to be identical with the reference curves of March 1978 and devoid of any asymmetry. The statements of Hopp and Witzigmann (1982) on a possible correlation of period changes with activity in light curves are considered.
Bergeat J.
Garnier R.
Lunel M.
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